Add missing doc and pretty print for Stmt_Declare

Make some doc comments more precise

Additionally add two further constructors

Move Node_Expr_FuncCallArg to Node_Arg (just like Node_Param)

Add specialized constructors for statement nodes with only one subnode

Add PHPParser_Node interface

Improve NodeDumper performance and make testAgainstDirectory more friendly

Swap argument order for ArrayItem

Some minor improvements (performance and exception wise) for the node traverser

Fix / improve some method doc docomments / signatures

Iterate replacement nodes using all visitors apart from the one having made the replacement

Properly parse escape sequences:

* Add support for oct and hex escape sequences
* Take used quote type into account when parsing encapsed strings

Instantiate a Node_Name for 'static', too. Fix some doc comments.

Fix NodeTraverser by putting to-be-deleted and to-be-merged nodes into the same queue. Additionally do not further iterate queued nodes.

Move Variable to Expr_Variable, move Stmt_FuncParam to Param (as it is used both in stmts and expr and both in funcs and methods)

Add specialized constructor for lambdas, too

Remove node analysis from analyze.php and fix some other things about it

Implement the debug parser by extending the normal parser. That way there is no need to repeat all action codes and lookup tables twice.

Use moriyoshi's fork of kmyacc, which fixes most of the issues of kmyacc with PHP

Add specialized constructors for all expression nodes apart from lambda

Rename cast nodes and give them a common Expr_Cast parent (with specialized constructor)

Add specialized constructor for binary operators

Rename Bin[ary] to Bitwise (which is the correct name)

Add specialized constructors for assignment operations

Add specialized constructors for Expr_Array*, make Variable an Expr

Make for-loop formatting nicer